It didn’t work for me. I only used it for many 3 weeks or so at a very low dose but it caused unpleasant inner tension and discomfort. Maybe it will work for you, good luck trying it!
I seem to have issues with emotional range, on sarcosine this got better but I had anhedonia and dysphoria from my antipsychotic at the time so most of the emotions I was having were negative.
When I’ve gotten sarcosine from brainvitaminz the small plastic scoop was inside the foil pouch - just feel around from the outside and you can usually find it.
If for some reason its not there - I had once asked BrainVitaminz about how the scoops/ tea spoons mapped into the gram dosings - and they said “one teaspoon of sarcosine (where the sarcosine is level with the top of the edge of the teaspoon is just over 1 gram. A heaping teaspoon is about two grams.”